August 2019 Regents Chemistry Exam
37 Which particle diagram represents a sample of oxygen gas at STP?
Solution: Oxygen is diatomic (a molecule of oxygen has two oxygen atoms), eliminating choices 1 and 2. It is a gas as stated in the question. Gases are spread out and take the shape of the container.
PS: To memorize diatomic elements, we can use the mnemonic BrINCl HOF
Prepare for the Chemistry Regents Exam: HERE
Contact us for chemistry tutoring: HERE